ClusterEnum

// CLUSAPI.dll
#include <windows.h>

DWORD ClusterEnum(
    HCLUSENUM hEnum,
    DWORD dwIndex,
    DWORD* lpdwType,
    LPWSTR lpszName,
    DWORD* lpcchName
);

<DllImport("CLUSAPI.dll", ExactSpelling:=True)>
Public Shared Function ClusterEnum(
    hEnum As IntPtr,   ' HCLUSENUM
    dwIndex As UInteger,   ' DWORD
    <Out> ByRef lpdwType As UInteger,   ' DWORD* out
    <MarshalAs(UnmanagedType.LPWStr)> lpszName As System.Text.StringBuilder,   ' LPWSTR out
    ByRef lpcchName As UInteger   ' DWORD* in/out
) As UInteger
End Function

' hEnum : HCLUSENUM
' dwIndex : DWORD
' lpdwType : DWORD* out
' lpszName : LPWSTR out
' lpcchName : DWORD* in/out
Declare PtrSafe Function ClusterEnum Lib "clusapi" ( _
    ByVal hEnum As LongPtr, _
    ByVal dwIndex As Long, _
    ByRef lpdwType As Long, _
    ByVal lpszName As LongPtr, _
    ByRef lpcchName As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

ClusterEnum = ctypes.windll.clusapi.ClusterEnum
ClusterEnum.restype = wintypes.DWORD
ClusterEnum.argtypes = [
    ctypes.c_ssize_t,  # hEnum : HCLUSENUM
    wintypes.DWORD,  # dwIndex : DWORD
    ctypes.POINTER(wintypes.DWORD),  # lpdwType : DWORD* out
    wintypes.LPWSTR,  # lpszName : LPWSTR out
    ctypes.POINTER(wintypes.DWORD),  # lpcchName : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('CLUSAPI.dll')
ClusterEnum = Fiddle::Function.new(
  lib['ClusterEnum'],
  [
    Fiddle::TYPE_INTPTR_T,  # hEnum : HCLUSENUM
    -Fiddle::TYPE_INT,  # dwIndex : DWORD
    Fiddle::TYPE_VOIDP,  # lpdwType : DWORD* out
    Fiddle::TYPE_VOIDP,  # lpszName : LPWSTR out
    Fiddle::TYPE_VOIDP,  # lpcchName : DWORD* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "clusapi")]
extern "system" {
    fn ClusterEnum(
        hEnum: isize,  // HCLUSENUM
        dwIndex: u32,  // DWORD
        lpdwType: *mut u32,  // DWORD* out
        lpszName: *mut u16,  // LPWSTR out
        lpcchName: *mut u32  // DWORD* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("CLUSAPI.dll")]
public static extern uint ClusterEnum(IntPtr hEnum, uint dwIndex, out uint lpdwType, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder lpszName, ref uint lpcchName);
"@
$api = Add-Type -MemberDefinition $sig -Name 'CLUSAPI_ClusterEnum' -Namespace Win32 -PassThru
# $api::ClusterEnum(hEnum, dwIndex, lpdwType, lpszName, lpcchName)

#uselib "CLUSAPI.dll"
#func global ClusterEnum "ClusterEnum" sptr, sptr, sptr, sptr, sptr
; ClusterEnum hEnum, dwIndex, varptr(lpdwType), varptr(lpszName), varptr(lpcchName)   ; 戻り値は stat
; hEnum : HCLUSENUM -> "sptr"
; dwIndex : DWORD -> "sptr"
; lpdwType : DWORD* out -> "sptr"
; lpszName : LPWSTR out -> "sptr"
; lpcchName : DWORD* in/out -> "sptr"
; ※HSP3.7は #func のため戻り値はシステム変数 stat に格納されます。

#uselib "CLUSAPI.dll"
#cfunc global ClusterEnum "ClusterEnum" sptr, int, var, var, var
; res = ClusterEnum(hEnum, dwIndex, lpdwType, lpszName, lpcchName)
; hEnum : HCLUSENUM -> "sptr"
; dwIndex : DWORD -> "int"
; lpdwType : DWORD* out -> "var"
; lpszName : LPWSTR out -> "var"
; lpcchName : DWORD* in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; DWORD ClusterEnum(HCLUSENUM hEnum, DWORD dwIndex, DWORD* lpdwType, LPWSTR lpszName, DWORD* lpcchName)
#uselib "CLUSAPI.dll"
#cfunc global ClusterEnum "ClusterEnum" intptr, int, var, var, var
; res = ClusterEnum(hEnum, dwIndex, lpdwType, lpszName, lpcchName)
; hEnum : HCLUSENUM -> "intptr"
; dwIndex : DWORD -> "int"
; lpdwType : DWORD* out -> "var"
; lpszName : LPWSTR out -> "var"
; lpcchName : DWORD* in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	clusapi = windows.NewLazySystemDLL("CLUSAPI.dll")
	procClusterEnum = clusapi.NewProc("ClusterEnum")
)

// hEnum (HCLUSENUM), dwIndex (DWORD), lpdwType (DWORD* out), lpszName (LPWSTR out), lpcchName (DWORD* in/out)
r1, _, err := procClusterEnum.Call(
	uintptr(hEnum),
	uintptr(dwIndex),
	uintptr(lpdwType),
	uintptr(lpszName),
	uintptr(lpcchName),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function ClusterEnum(
  hEnum: NativeInt;   // HCLUSENUM
  dwIndex: DWORD;   // DWORD
  lpdwType: Pointer;   // DWORD* out
  lpszName: PWideChar;   // LPWSTR out
  lpcchName: Pointer   // DWORD* in/out
): DWORD; stdcall;
  external 'CLUSAPI.dll' name 'ClusterEnum';

result := DllCall("CLUSAPI\ClusterEnum"
    , "Ptr", hEnum   ; HCLUSENUM
    , "UInt", dwIndex   ; DWORD
    , "Ptr", lpdwType   ; DWORD* out
    , "Ptr", lpszName   ; LPWSTR out
    , "Ptr", lpcchName   ; DWORD* in/out
    , "UInt")   ; return: DWORD

●ClusterEnum(hEnum, dwIndex, lpdwType, lpszName, lpcchName) = DLL("CLUSAPI.dll", "dword ClusterEnum(int, dword, void*, char*, void*)")
# 呼び出し: ClusterEnum(hEnum, dwIndex, lpdwType, lpszName, lpcchName)
# hEnum : HCLUSENUM -> "int"
# dwIndex : DWORD -> "dword"
# lpdwType : DWORD* out -> "void*"
# lpszName : LPWSTR out -> "char*"
# lpcchName : DWORD* in/out -> "void*"
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。